Very few people are aware of the vital role magnesium plays in our bodies. After oxygen, water, and basic food, magnesium may be the most important element needed by our bodies, activating over 300 different biochemical reactions necessary for your body to function properly. The U.S. minimum RDA for magnesium is about 320 mg per day for women and more than 400 mg per day for men, while optimum daily amounts are closer to 500 to 700 mg per day - yet studies show that most people regularly take in about half of that and that over 8 out of 10 people do not take enough daily magnesium for even the minimum daily amounts recommended. Recent research has revealed that this lack of magnesium may put your heart - and your health - at significant risk.